Update otpController.js

[AKSHITHA-CHILUKA]

Please include a summary of the changes and the related issue. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes #489

Type of change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Refactor code
• Documentation update
• Other (mentioned in the issue number)

How Has This Been Tested?

Verify that OTPs are generated correctly, stored in the database with an expiration time, and automatically removed after the expiration period.

Test A: Describe here
heck the response to ensure that an OTP is returned and the success message is displayed.
Verify that the OTP is stored in the database with the correct email, otp, and createdAt fields.
Wait for the expiration period (5 minutes).

Test B: Describe here (if required)

Screenshots and Videos

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Checklist

Please mark with an X the items that apply:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

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